Cowboys special teams coach Joe DeCamillis broke his back and 11 more were injured when winds just shy of tornado strength ripped through the roof of the team's indoor practice facility during a rookie minicamp Saturday in Irving, Texas.

Former coach Dan Reeves, DeCamillis' father-in-law, says the first-year Dallas assistant has a couple of broken vertebrae in his lower back.

Reeves added DeCamillis probably will have surgery. The coach was seen being removed on a stretcher wearing a neck brace.

"They say he's lucky not to be paralyzed," Reeves said.

The storm hit while 27 players were going through workouts. Officials say there were about 70 people in the facility.

Of the 12 hospitalized, 10 were taken by emergency vehicles and two went on their own.

"Right now, I think we don't have anybody who is in a life-threatening situation," Dr. Paul Pepe, head of emergency medical services for Dallas County, said.

The storm knocked out power at team headquarters and splintered trees across the property. Power was out at team headquarters for about an hour.

"We're lucky no one got electrocuted with all the water in the building," head coach Wade Phillips said.

Harvin released from hospital

Vikings first-round pick Percy Harvin was released from an Atlanta hospital, two days after being admitted because of dehydration and a virus.

Harvin, a receiver from Florida drafted No. 22 overall last weekend, was traveling from Florida to the Twin Cities on Thursday when he became sick during a layover in Atlanta.

Elsewhere

Philadelphia Eagles defensive coordinator Jim Johnson has continued to perform his duties while undergoing treatment for skin cancer. Johnson turns 68 this month. He was first diagnosed with cancer in 2001. ... The Detroit Lions have hired Jeremiah Washburn as assistant offensive line coach. Washburn joins the Lions after spending six seasons working in the player personnel department for the Baltimore Ravens.